Prediction of colonization by macrophytes in the Yaciretá reservoir of the Paraná river (Argentina and Paraguay)
The potential colonization by anchored plants (PCAP) and the potential areas for initial coloniza- tion of free floating plants were estimated during the early filling phase for the Yaciretá reservoir. In order to obtain the PCAP, the observed maximum depth of colonization of the anchored macro-...
Guardado en:
| Autores principales: | , , , |
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| Formato: | Artículo |
| Lenguaje: | Inglés |
| Publicado: |
Instituto Internacional de Ecología
2022
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| Materias: | |
| Acceso en línea: | http://repositorio.unne.edu.ar/handle/123456789/48856 |
| Aporte de: |
| Sumario: | The potential colonization by anchored plants (PCAP) and the potential areas for initial coloniza-
tion of free floating plants were estimated during the early filling phase for the Yaciretá reservoir.
In order to obtain the PCAP, the observed maximum depth of colonization of the anchored macro-
phytes before impoundment and the hypsographic curves were used. The species inhabiting the pre-
impoundment area were classified according to the different bioforms before the inclussion in the
analysis. The areal extent of PCAP (from depths between 0-4 m) could reach 275 km2
at 76 m above
sea level (current water level), whereas at 82 m above sea level (final filling level) the littoral zone
will be increased by about 21.5%. The potential area for geophytes was estimated to be 99 km2
; 131 km2
for root-floating leaved plants and 120 km2
for submerged plants, at 76 m above sea level. At 82 m
above sea level, the geophytes could reach 271 km2
. The data for wind frequency, velocity and fetch,
together with depth were used to calculate shallow and sheltered areas in which free floating plants
could find favourable conditions to initial colonization. Physical and chemical features recorded at
eight stations during the early filling phase are discussed in relation to potential plant development. |
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